germany has been a reluctant partner here. it's not just the corporations that have deep ties with russia. it's also oil and gas. germany gets one-third of its oil, one-third of its gas from russia. they have a lot to lose with tougher sanctions. >> thanks very much. we will have more on this sunday on "this week". >>> let's go to amy with today's other top stories. >> good morning, everyone. >>> and we begin with wall street, reacting to nice that the economy is picking up steam. 288,000 jobs created in april, the best in two years, and helped drive down the unemployment rate to 6.3%. the lowest in five years. and more americans dropped out of the labor force. >>> and a terrifying crash in south korea. one train crashed into another, throwing it off the tracks, injuring 170 people. passengers were told to stay inside the train. most of them ignored that order. they forced the doors open to escape. >>> also breaking overnight, two alaska troopers have been shot and killed on duty, including one who appeared on a popular cable